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Finding the Fourth Proportional to 103,630.80, 155,446.20 and 28,750.80

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Solution

The fourth proportional to 103,630.80, 155,446.20 and 28,750.80 is: 43,126.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,630.80 : 155,446.20 = 28,750.80 : x
  2. Step 2: Convert to fraction form
    103,630.80/155,446.20 = 28,750.80/x
  3. Step 3: Cross multiply
    103,630.80x = 155,446.20 × 28,750.80
  4. Step 4: Simplify right side
    103,630.80x = 4,469,202,606.96
  5. Step 5: Solve for x
    x = 4,469,202,606.96/103,630.80
  6. Step 6: Final answer
    x = 43,126.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.